Machine for grinding pulp from wood



3 Sheets Sheet l.v

(No Model.)

A. B. TOWER. MACHINE POR (1r-BINDING PULP PROM' WOOD.

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N. PETERS. Phnm-Luiwgmplmn wmu'ngwn. D.c.

(No Model.) 3 Sheets-Sheet A. B. TOWER.

MACHINE FR' @BINDING PULP FRM WD. N0. 311,212.

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(-No Model.) 3 Sheets-Sheet 3.

A. B. TOWER.

MAGHINB FOR GRINDING PULP PROM Woon.

No. 311,212. Patented Jan. 27,1885.

K @1 f I," E? alienwa- Y v by Y UNITED STATES PATENT OFFICE.

ASHLEY B. TOWER, OF HOLYOKE, MASSACHUSETTS.

MACHINE FOR GRINDING PULP FROM WOOD.

PECIEICATION forming part of Letters Patent No. 311,212, dated January27,1885. Application led July 14, 1894. (No model.)

To @ZZ whom, it may concern:

Be it-known that I, ASHLEY B. TOWER, of Holyoke, in the county ofHampden and State of Massachusetts, have invented certain new and usefulImprovements in Machines for Grinding Pulp from Wood, of which thefollowing, taken in connection with the accompanying drawings, is aspecification.

My invention relates to that class of ma- 'chines for producing woodpulp, in which a series of wood-holding chambers or hoppers arearrangedaround a common grinding-wheel mounted upon and revolving about avertical axis; and it consists in certain novel constructions,arrangements, and combinations of devices, which will be readilyunderstood by reference to the description of the drawings, and to theclaims to be hereinafter given.

Figure 1 ofthe drawings is a sectional plan of a machine embodying myinvention, the cutting plane of the sectional portion being on line 1 1on Fig. 2. Fig. 2 is a vertical section on line 2 2 on Fig. 1. Fig. 3 isa similar section i showing a modiiication of the grinding-wheel. Fig'.4 is a side elevation of one of the feed-boxes or hoppers and itsoperating cylinder, drawn to an enlarged scale. Fig. 5 is a horizontalsection on line 3 3 on Fig. 4. Fig. 6 is a vertical transverse sectionon line 4 4 on Figs. 4 and 5. Fig. 7 is a vertical section on line 5 5on Fig. 4, looking toward the grinding-wheel. on line 6 6 on Fig. 7 Fig.9 is a similar section online 7 7 on Fig. 7. Fig. 10 is a partialhorizontal section on line 8 8 on Fig. 4. Fig. 11 is a horizontalsection on line 9 9 on Fig. 2, enlarged. Fig. 12 is a partial verticalsectional elevation on line 10 10 on Fig. 4, looking toward the outerend of the cylinder, and drawn to a still larger scale; and Fig. 13 is ahorizontal section on line 11 11 on Fig. 12.

A is the main cylinder, to receive the grinding-wheel B, `which may bean ordinary grindstone, as shown in Fig. 3, or it may be a metallicwheel carrying a band of emery or other suitable abrading material, a,as shown vin Figs. l and 2. The cylinderA is provided at its lower endwith the outwardly-projecting liange A', by which it issupported andsecured in position, and with the annular trough A2 to receive the pulpas it is ground from the wood,

, grinding-wheel Fig. 8 is a horizontal section and from which it isdischarged through the discharge-pipes A3 A3, opening therefromtangentially to the periphery of the grindingwheel, as shown in Figs. 1,2, and 3. The

B is mounted upon the vertical shaft C, which has its bearings in theyoke D, bolted to the under side of the trough A2, and in the spider D',supported in the cylinder E', projecting upward from and forminga partof the cover E, and in a suitable step or thrust bearing, (not shown,)the lever end of said shaft C, with its driving-pulley and stepbearing,being broken awa-y. The cover E is firmly bolted to the upper end of thecylinder A, and has cut through it two series of openings which areclosed by the light removable covers b b and c c, respectively, saidopenings being intended to facilitate the inspection of the progress ofthe work. The cylinder E has secured to its upper end the cover E2, inthe center of which is an opening designed to facilitate the oiling ofthe upper bearing of the shaft C, and closed by the light cover d. Thespider D rests in recesses formed in the inwardly-projecting lugs e e,and is adjustable laterally by means of the set-screws e' e', as shownin Figs. 2, 3, and 11. The cylinder A has cut through its vertical wall'a series of rectangular openings to receive the inner ends ofthefeed-boxes or hoppers F F, which are supported in position with theirbottoms inclined toward the cylinder A, so that any pulp which may workvoutward into said hoppers will readily dow back into the cylinder andfall into the trough A2, as shown in Figs. 2, 3, and 4. The inner endsof the hoppers are supported by the wall of the cylinder A, and theouter ends by the columns F and F2, as shown in Figs. 4 and 7. Thecylinder A has outwardly-projecting anges f, around three sides of therectangular openings in which the hoppers are tted, to which saidhoppers are secured by means of the bolts g, whichtpass through holes inthe side walls of the hoppers F, and through slots f', formed in theflanges f, as shown in Figs. 4 and 10. The hoppers F may be adj ustedtoward the grinding-wheel as the stone wears away by means of the boltsh, which pass through ears f2 on the iianges f, andcorresponding ears, f3, on the side walls of the hoppers F, as shown in Figs. 4and 5.

IOC

It will be noticed, ou reference to Figs. l and 5, that the hoppers Fare so located relative to the grinding-wheel that radial lines drawnthrough the axis of said wheel and parallel with the sides of thehoppers will cut through said hoppers near one side wall thereof insteadof through their centers, as heretofore practiced, the purpose of whichis to prevent slivers of wood being split off at the end where the stoneleaves it, by causing the motion of the grinding stone or wheel at thatpoint to be parallel with the grain of the wood, or nearly so. The outerends of the hoppers F are closed by the heads F2, each provided at itscenter with a. stuffing-box, F4, and having bolted thereto the cylinderG, provided with the piston G, secured to one end of the rod G2, whichpasses through the stuffing-box F4, and

- has secured to its other end the pistou or follower H, provided upontwo opposite sides with the lugs i i, which project into the .grooves jj, formed in t-he inner faces of the side walls of the hopper F, asshown in Figs. 5 and 6.

I and I are two three-way valves,located beneath the cylinder G andconnected together by the pipe l2, and with the interior of the cylinderG by the pipes Jaud J, respectively, and provided,respectively, with thedischargepipes J2 and J, and with long stems '12, which are mounted inbearings in the stands K K, which in turn are adjustably mounted on thebed-plates K, as shown in Figs. 4, 7, and 8.

JL is the supply-pipe,through which water, steam, or other iiuid may beadmitted to the pipe 12, aud thence through the valve l and pipe J tothe outer end of the cylinder G, or through the valve I and pipe J tothe inner end of said cylinder. The valve-stems z" and i2 have mountedthereon the wheels L and L', respectively, as a means of operating saidvalves. The wheel L has pivoted to its rim, upon one side, one end ofthe rod L2, the other end of which is forked to receive the pin 7c, setin the rim of the wheel L in such a manner that the wheel L may berotated independent-Y ly of the rod L2, when desired, at which time therod L2 is supported by the bracket Z, projecting upward from one of thestands K, as shown in Fig. 4. The wheel L has formed in its rim adetent-notch to receive the hook on the end of the elbow-lever on, tolock said wheel in the position shown i'n Fig. 4. The wheel L hassecured to its periphery, at a point near the attachment thereto of therod L2, a chain or wire rope, which depends from opposite sides thereof,as at a and n', and has attached thereto the weights M and M, as shown'in Fig. 4. The pendent cable n has secured thereon a ball orenlargement, o, by means of which and the two grip-jaws pp the weight Mis suspended with slack sufficient in said cable between said ball andthe attachment of the cable to the wheel to permit said wheel to make aquarter-revolution in the direction indicated by the arrow withoutaffecting the weight M,

the whole weight ofthe weight M heilig sus'- pended from the wheel L bythe cable a', said weight M being of sufficient capacity to rotate bothwheels L and L and their valves when the locking-latch m is disengagedfrom the wheel L, and the weight M being of sufficient capacity torotate the wheel L back to its original position and raise the weight Mwhen the grip-jaws p p are released from engagement with the ballo. Thegrip-jawspp are pivoted to ears projecting from the stands K K, and areconnected togctherbythe toggle-linksqq,to the central pivot of which isconnected the forked lower endof the rod r, the upper end of which ispivoted to one end of the elbow-lever r', which in turn is pivoted at r2to the side of the hopper F, and has set in its other end the pin r2,which projects through a slot, s, cut in the side of said hopper, intothe groovej in a position to be struck by the lug z' of the followerHjust before the completion of its outward movement, and cause amovement of the' elbow-lever r about its fulcrum, thereby raising therod r, which, acting through the togA gle-links q q, causes the movableends of the grip-jaws pp to separate, and thus release the weight M.

N is a rod or bar mounted in bearings s and s2, secured to the sideofthe hopper F, and in a groove formed iu the inner face of the flangef, and is pivoted at its outer end to the locking-latch m, and hasinserted in its inner end the pin t, which projects through a slot, t,cut in the side of the hopper F, into the groove]` in'positiou to bestruck by the lug z' of the follower H just before the completion of itsinward movement, thereby causing an endwise movement of said bar N, andthrough it a movement of the locking-latch m about its pivot, whichreleases the wheel L and permits it to be moved in the direction of thearrow by the descent of the weight M, it being understood that when thistakes place the weight M has been raised upso as to remove its tensionfrom the wheel L by suspending it from the'grip-jaws p p, as shown inFigs. 4, 7, and 12. The hoppers F F are provided with covers O, hingedto the cover E, and provided with the handle a, for convenience inraising said covers, all as shown iu Figs. l, 2, and 3. The interior ofthe cylinder E of the cover E has fit-ted therein, below thespider-bearing D, the annular trough c, and the shaft C has securedthereto with an oil-tight joint the iuverted cup w, the annulardownwardly-projecting lip of which shuts over and incloses the innerupwardly-projecting annular wall of the trough e, as shown in Figs. 2and 3, the purpose of whichis to catch any drippings of oil that mayfall from the bearing D', and effectually prevent said oil from comingin Contact with the pulp.

P P are pipes for supplying water to the IOO iro

grinding-wheel from any convenient source of 13o supply.

The operation of my invention is as follows:

The parts being in the positions shown in the drawings, and thoseportions of the hoppers or feed-boxes between the followers H and thegrinding-wheel B being filled with wood, and water .or steam having beenturned on through the pipes J, it. iiows through the pipes I2, valvesI', and the pipes J' to the interior of thecylinders G, outside of thepistons G', thereby forcing said pistons and the wood toward thegrinding-wheel, which, having rotary motion imparted thereto in anywellknown manner, grinds the wood into pulp, which, with the wateradmitted to the cylinder A through .the pipes P. P, falls into the jannular trough A2, from which it is discharged through the pipes A3 A3into any desired receptacle. When either of the followers H has movedforward to within a short distance from the periphery of thegrinding-wheel, one of its lugs t comes in contact with the pin t andmoves the bar N toward the grinding-wheel` till the locking-notch ni isreleased from the detent-notch in the side of the wheel L, when theweight M' descends, and imparts to the wheels L and L', and valves I andI', a movement about their axes equal to a quarter-revolution, therebycausing the supplyof water or steam to flow from the pipe J4 through thepipe I2, valve I, and pipe J to the inner end of the cylinderG, betweenits piston G'and the head F3, to force the piston G' toward the outerend ofthe cylinder G, while the water or steam upon the other side ofsaid piston escapes through the pipe J', valve I', and pipe J3. As thefollower H nears the extremeof its outward movement one of its lugs icomes in contact with the pin r3 and moves the elbow-lever r' about itspivot, and raises the rod r, causing the grip-jaws p p to open andrelease the weight M which, descending, moves the wheel L and the valveI about their axes in a direction the reverse of their previousmovement, to open communication through the valve I from the inner endof the cylinder to the discharge-pipe J2, the rod L2 moving with thewheel L and leaving the wheel L' unaffected by said movement, the outerend of said rod L2 being supported by the bracket Z in such a positionthat the pin k in the wheel L-will engage with its fork when it isrotated back to vits former position, to admit water or steam to theouter end of the cylinder G,which is done by the operator after thehopper has been again filled with wood. The weight M is then -raised upby the operator and suspended from the grip-jawspp, as shown in Figs. 4.7, and 12, the jawsp p opening to permit the upward passage of the ballo, the central pin in the toggle-links q q moving upward inthe slot z inthe lever end of the rod r. As the grinding-wheel wears away the severalhoppers, with the cylinders G, together with the pipes, valves, andvalve-operating mechanism are moved inward, by first slackening the nutson the bolts x x in the feet of the stands K K and the column F2, andthe nuts on the bolts f', and

g, and screwing up the nuts on the bolts h, as before described. Thelocking -lat-ch m is forced into engagement with the detent-notch in therim of the wheel L by the spring 1,acting upon the bar N to move itoutward. A notch, z', is cut in the lower edge of that side of thehopper toward which the grindingwheel revolves, and near its inner end,so as to be within the inner circumference of the cylinder A, the objectof which is to facilitate the discharge into the trough A2 of any pulpor liquid which may work its way into the hopper among the pieces ofwood contained therein. The motions ofthe wheels L and L' in eitherdirection arelimited bysuitablestops, represented in the drawings by thepins a' and a2,which alternately come in contact with thestand K, asshown in Figs. 4 and 5.

Another advantage of having the bottoms of the hoppers F inclined to theplane of revolution ofthe grinding-wheel is to enable the wood to bepacked in the hopperon end, and

at the same time grind obliquely to the grain of the wood, therebypreventing the drawing out of long fibers without properlydisintegrating them.

NVhat I claim as new, and desire to secure-by Letters Patent ot' theUnited States, is-l l. In combination with a grinding-wheel arranged tobe revolved about a vertical axis, one or more feed-boxes or hoppers,arranged with their bot-toms inclined to the plane of revolution of saidwheel, substantially as described. i i

2. In combination with agrinding-Wheel arranged to revolve about avertical axis, one or more feed-boxes or hoppers arranged with theircenter lines (as viewed in plan) at one side of but parallel with radiallines drawn through the center of said wheel, substantially as and forthe purposes described.

3. rIhe cylinder A, provided with the annular trough A2 and one or moredischargenozzles, A3, opening therefrom in a direction tangent,or nearlyso, to said trough, substantially as and for the purposes described.

4. The combination ofthe cylinder A, having cut through its verticalwall one or more rectangular openings, one or more hoppers, F,titted tosaid openings, the bolts g, the slots the bolts h, and earsf2 and f3,all arranged and adapted to Voperate substantially as and for thepurposes described.

5. The combination, with the cylinder A and grinding-wheel B, of thehopper F, the cylinder G, the piston G', and follower H, mounted upon acommon piston-rod, the pipes I2, J, J', J", J3, and J* for conveyingwater or other iiuid to the cylinder G, and the threeway valves I andI', for controlling the iow of said water or steam, substantially asdescribed.

6. The combination of the hopper F, the follower H, the cylinder G, thethree-way valve I, the wheel L, mounted upon the stem of said valve, theweight M, connected to the Wheel L by the cable n, the ball orenlargevIOD ment o on said cable, the gripjaws pp, arranged to supportthe Weight M independent ofthe wheel L, the links q q, the rod r. theelbow-lever r. and the pin r3, all arranged and adapted to operatesubstantially as described.

7. The combination of the hopper F, the follower H, the cylinder G, thepiston G and rod G2, the three-way valve I, the wheel L, mounted uponthe stem of said valve, and provided with adetent-notch in its rim, theweight M', suspended from the periphery of said wheel,thelockinglatchleverm, the bar N, and the pin t, all arranged andadapted to operate substantially as and for the purposes described.

8. The combinationl ofthe hopper F, the cylinder G, the piston G', therod G2, the follower H, the three-way valves l and I', the Wheels L andL, mounted upon the stems of said valves, the rod L`Z for connectingsaid Wheels, the differential weights M and M, connected to the wheel Lby suitable fiexible connections, the grip-jaws p p for supporting` theweight M independently of the wheel L, the links q q, rod r, elbow-lever1", the pin r3, the bar N, provided with the pin t, the spring y, andthe locking latch-lever m, arranged to engage with. a detent-notch inthe wheel L, all constructed and adapted to operate, substantially asand for the purposes described.

9. In combination with a grinding-Wheel arranged to revolve about avertical axis, and a bearing for its shaft above said wheel, the bearinginclosing cylinder E, Vthe annular trough c, fitted to said cylinder,and the inverted cup w, attached to the shaft of said Wheel,substantially as described, for the purpose specified.

10. The combination of the grinding-Wheel B, the shaft C, the cylinderA, the cover E, provided with the cylinder E', having the in-Wardly-projecting` bearing-lugs e c, the spiderbearing D', and theset-screws c e', all arranged and adapted to operate substantially asdescribed.

11. The combination ofthe hopper F, provided With the longitudinalgroovesjj, and the slots s and t', the follower H, provided with thelugs 'i ,"the bar N, provided with the pin t, the locking-latch m, thewheel L, provided with a detent-notch to receive said latch, theelbow-lever r, provided with the pin r3, the rod r, provided with theslot z in its lower end, the links q q, the gripjaws p p, the weight M,connected to the wheel L by the cable n, and the ball or enlargement oon said cable, all arranged and adapted to operate substantially asdescribed.

12. In combination, with the cylinder A and the grinding-wheel B, thehopper F, arranged to project through the wall of the cylinder A intoits interior, and provided with the discharge-mince z', substantially asdescribed.

13. ln a machine for grinding Wood pulp, the combination of agrindingwhecl mounted upon and adapted to revolve about a vertical axis,a suitable casinginclosing,` said Wheel,one or more feed boxes orhoppers fitted to rectangular openings in the vertical wall of saidcasing, a cylinder extending outward from each of said hoppers, andcontaininga piston connected with a follower in said hopper, pipes forconveying water or other fluid to and from said cylinder, valves forcontrolling the flow of said luid, and devices for operating said valvesby the movements of the Wood-feeding follower, when all of these partsare adjustable horizontally, or nearly so, toward the axis of thegrindingwvheel, substantially as described.

In testimony whereof Ihave signed my naine to this specification, in thepresence. of two subscribing witnesses,on this 10th day of July, A. D.1884.

ASHLEY B. TOWER.

Vitnesses:

N. C. LOMBARD, WALTER E. LOMBARD.

